gbannis



C. W. GRANNIS.

Cooking Stove.

Paftented April 22, 1851.

n l a o o m. w N Q m o n C n r. .u .x

N PETERS. Philolilhograpber, Wuhingtnn, D. C.

t f GHARIJESnW. GRANN-ISJDF?GOWANDA,iNEW"YORK. a-r

q, a womaswom 1Specificatiorro LettersIEatent.-1\To.183150,,datedAPriLZQ, 1851L---.- Q

To all whomzft may ooncemi n 1 I Be it known that LGHAR Es .LFGRANNIS,of Gowanda, in the county of Erierand State of .New York;haveyinventednew and 5 useful l1 "Improvements in Gooking Stoves,

and that th'e following is a full,:c 1ear,= and exact description of.theiprinciple or cliaracter thereof :awhich Jdistinguishesrthenr ifromLall other thingsubefore known,1-:and of the. manner of making,constructing, and usingir the same,referencje' being had to theaccompanying drawings, making part of; this specification, in which r lFigure 1 is a plan; Fig. 2, a longitudinal vertical section; Fig. 3, ahorizontal section taken at the line (A a) of Fig. 2; and Figs. 4

5 and 6, cross vertical sections taken at the lines (B 72) 5C 0) and (Dd) of Fig. 1.

. The same etters indicate like parts in all the figures.

In my improved stove the products of combustion pass up from the firechamber under the kettle or pots, and thence around the elevated oven,while a current of hearth and fire back passes into and through theoven.

The first art of my invention consists in arranging ues into which airis to be adin the corner of the bottom plate, the said flues beingarranged between two fire flues which conduct the products of combustionfrom the fire chamber to flues surrounding the elevated oven, so thatthe air on its way to the oven shall be heated along its whole passage,the said air-flues retaining the same or nearly the same capacity alongtheir entire length to prevent the air pass 4Q. ing to the oven fromlosing its sensible heat by expansion, for it will be obvious that ifthe hot air flues opened directly into an enlarged chamber under theoven bottom, as in other stoves heretofore made, it would expand andthus lose its sensible heat, before entering the oven, but by myimprovement I not only heat the air more effectually but it enters theoven before losing its sensible heat and will therefore be moreeflicient in baking. And the second part of my invention consists incombining with the air heating chambers in the fire back a flue or flueswhich pass out from near the bottom of the fire chamber, so that the airin the said chambershall be heated on one side by l the fire in the firechamber and by theprod:

heated air from a hot-air chamber under the mitted to pass into the oventhrough holes boiler holes and one on each side of the hotfluesatthetbackthereof.

i #In the accompa'nyingdrawings .1(:a) repre-ixzr sents the firechamberl'ofamy improved stove,; and (6-) the hearth platesawith achamber'e (0) it below it divided into two compartments by alongitudinal vertical partition (dim Cold air is *admittedzto eachofx-these compartments: throughcholes". (e *6) win: lthet bot;- E tom,and as itqis 'heated by radiatiomiitwqis made tdcirculatemrider thehearth plate byte passing from" each hole outwardtaroundrthe end of twolateral l'partitions (f f) i then stoe; ward the middle, around the ends'of two 0 other partitions (g 9), then outward around the ends of athird set of partitions (h h) and then inward and up two shortverticalflues and thence into two chambers (j 5') formed back of the fire back(71:), these 5 two chambers being separated by a vertical partition (1).These chambers are provided with lateral partitions (m m), (n n) and (o,0), similar to those in the chambers below the hearth plate and for thesame purpose; but in addition to the heated air which enters thechambers from the chambers under the hearth, cold air is introduced intothem from the rooms through ucts rofr combustion in =passing ethroughthe. o F

holes p p) in the bottom plate (g) of the g5 stove. The heated air inthese chambers passes out from the top of the chambers (j j) into ahorizontal flue (r) in the top of the stove and between the two rangesof boiler holes (8, s, s, s) and between the two main fire flues, and itis delivered through two holes (25, 27,) in the bottom plate of theoven(u) and under a second plate ('0) which constitutes the baking bottom ofthe oven. This latter plate does not, however, extend the whole lengthof the oven, a space being left at each end and near the oven doors forthe passage of the heated air, which after circulating through the ovenescapes through a hole (:12) in the top plate of the oven to the fireflue above the oven. The products of the combustion pass out from thetop of the fire place, over the fire back into two horizontal flues (y,y,.) under the air flue (r) and thence pass around the elevated oven tothe exit pipe (2), a damper (a) being placed near the exit pipevtogovern the discharge of the products of combustion, so that when this isclosed they shall pass around the oven, and when open pass directly outwithout heating the oven.

In addition to the flues just described ing additional heat to the-airin its passage through the hot air chambers at the back,

.qwhich but for these fiues would be kept comparatively cool by theexposure of the outer plate thereof to the cold air of the room.

The number of lateral partitions in the hot air chambers can beincreased or diminished' at pleasure, but the number described andrepresented are deemed the best.

What I claim as my invention and desire to secure by Letters Patent is.1. vThe arrangement of the fines which conduct the heated air to thespace under the oven bottom from which it is discharged into the oven atthe corners thereof and without any enlargement to permit the expansionof the air, before it reaches the oven as" described when this iscombined with the arrangement of fire flues on each side thereof, asdescribed, .whereby the air passing to the oven is heated along thewhole distance of itspassage by the products of combustion fromthe fireplace as described.

2. I also claim as my invention the heating of the air in its passagethrough the back hotair chambers by'combining with such airchambers andthe main-fire flues, the branch fire flues which pass back of the saidair chambers, substantially as de-.

scribed.

CHAS. WFGRANNIS. Witnesses R. MoLERrrH, I-I. SHATTUCK.

